1231430660 has 24 divisors (see below), whose sum is σ = 2722110720. Its totient is φ = 466647264.

The previous prime is 1231430657. The next prime is 1231430693. The reversal of 1231430660 is 660341321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1619924 + ... + 1620683.

It is an arithmetic number, because the mean of its divisors is an integer number (113421280).

Almost surely, 2^1231430660 is an apocalyptic number.

1231430660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231430660 is an abundant number, since it is smaller than the sum of its proper divisors (1490680060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231430660 is a wasteful number, since it uses less digits than its factorization.

1231430660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240635 (or 3240633 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1231430660 is about 35091.7463230316. The cubic root of 1231430660 is about 1071.8565201618.

Adding to 1231430660 its reverse (660341321), we get a palindrome (1891771981).

The spelling of 1231430660 in words is "one billion, two hundred thirty-one million, four hundred thirty thousand, six hundred sixty".